Stately’s Home Middle 1 widget area in 75 / 25 layout

This members-only tutorial provides the steps to re-arrange two widgets placed in Stately's Home Middle 1 widget area from the default 50 - 50 into 75 - 25.

Before:

After:

We shall edit the code that adds flexible-widgets class to all the home-middle widget areas such that this class does not get added to home-middle-1 widget area, then use Flexbox to show the two widgets side-by-side in a 75-25 configuration.